Machine for cutting paper-box blanks



(No Model.) 3 Sheets-Sheet 1.

A. KINGSBURY.

MAGHINE FOR CUTTING PAPER BOX BLANKS. No. 346,165. Patented July 27,1886.

wesaes IUVEUTUFL c/ (No Model.) 3 Sheets-Sheet 2.

A. KINGSBURY.

MACHINE FOR CUTTING PAPER BOX BLANKS.

No. 346,165. Patented July 27, 1886.

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(No Model.) 3 Sheets--Sheet 3. A. KINGSBURY.

MACHINE FOR CUTTING PAPER BOX BLANKS.

Patented July 27-, 1886.

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. ZPQZZW 1 UNITED STATES PATENT OFFICE.

ADDISOA KINGSBURY, OF SOUTH COVENTRY, CONNECTICUT.

MACHINE FOR CUTTING PAPER-BOX BLANKS.

SPECIFICATION forming part of Letters Patent No. 346,165, dated July2'7, 1886.

Serial No. 168,209.

(No model.)

To all whom it may concern:

Be itknown that I, ADDISON KINGSBURY, a citizen of the United States,residing at South Coventry, in the county of Tolland and State ofConnecticut, have invented certain new and useful Improvements inMachines for Cutting Paper-Box Blanks, which improvements are fully setforth and described in the following specification, reference being hadto the accompanying three sheets of drawings.

This invention relates to that class of ma chines which, taking thepaper or cardboard in continuous strips or rolls, feeds the sameautomatically to a suitable cutting device,and, after having completed acut, separates the blank from the scrap; and it consists in the improvedconstruction and combinations of parts hereinafter fully described andclaimed.

In the drawings hereunto annexed, Figure 1 is a side elevation of myimproved cuttingrnaehine, a portion of the frame being cut away. Fig. 2is a view of one of the boxblanks which said machine is designed tomake, one end of said blank being slightly turned up. Fig. 3 shows theform-in which the scrap is left after passing through the machine. Fig.4 is a view of said machine from the rear side, the same being shown asraised to alevel, and with the feed-rolls and scrap-picker removed toshow more clearly the relative arrangement of the punch and cutting-die.Fi 5is a detached perspective view of the scrappicker, and Fig. 6 adetached view of the guide provided near the point where the paperenters the feed-rolls. In Fig. 7 I have shown the side of the machineopposite that shown in Fig. 1, for the purpose of illustrating themechanism by which the feedrolls and scrap-roll are moved. Fig. Sis anenlarged view of the under or cutting face of my new form of die, one ofthe corners and its screw being shown detached. Fig. 9 is a perspectiveview of the punch which I use with the cutting-die above referred to.Fig. 10 is a sectional view taken on line 00 0c of Fig. 8 and throughthe center of the punch I. Fig. 11 is a detached perspective view of oneof the corner cutters.

In the several drawings, the letters A A represent the frame of thepress, to which I have attached my improvements, said frame carrying inproper bearings at its upper end a shaft, 13, whose central portion isformed with an eccentric bearing, to move up and down the carriage C,the general arrangement thus far named being the same as in presses nowin common use.

Dovetailed into the lower face of the vertically-moving carriage C is aplate, E, which is secured to said carriage by a wedge, a, and to thelower side of said plate is screwed or bolted the cutting and scoringdie, which forms one of the essential features of my invention, andwhich I will proceed to describe in detail.

F represents a blank or core, made, preferably, of cast metal, of thesame size and outline as the punch shown in Fi 9. The outer face of saidcore is planed or otherwise grooved to receive the four scoring-knivesa, (see Fig. 10,) the contiguous ends of said scoringknives beingbrought together to form a rectangular outline, as seen in Fi 8.

At each corner I have provided a knife, (I, shaped as a right-angletriangle, whose apex abuts the corner formed by the adjacent ends of thescoringknives before described. These corner knives, d, are backed off,as shown in Fig. 11, to form cuttingedges, and are socured rigidly tothe core F by screws 0.

Extending from corner to corner are knives H, whose cutting-edge at eachend is of precisely the same height as the corner cutters, but ispreferably raised at the center to give a shearing cut as the die passesdownward over the punch. These knives H are also secured to the core byscrews f, and may be readily removed for sharpening. The cutting-edge ofthe scoring-knives c is located a considerable distance below the edgeof the corner and side cutters, so that the die passes down over thepunch and completely cuts the outline of a blank before said blankreaches said scoringknives. The continued movement of thedie then forcesthe blank against the scoringknives sufficiently hard to partly cut, or,rather, indent,said blank, as indicated by dotted lines in Figs. 2 and9, so that the box-formers may easily bend up the blank to form thedesired box.

In order to force the blank thus cut and scored out of thedie, I haveprovided two or more leaf-springs, h, whose free ends act to remove saidblank as the die recedes, as will be understood by reference to Fig. 10.

When in use, punch I is secured to the bed of the press, and thecutting-die F to plate E, as in Fig. 1.

Referring again to Fig. 1, K represents a metallic frame bolted securelyto the bed of the press and slotted to form bearings for shafts 117s.Said shafts carry feed-rolls N O, and are geared together at one end, asshown in Fig. 7

To move the feed-rollers intermittently I have provided a gear, P,having on its outer face a ratchet-wheel, m, which is engaged by a pawl,12, actuated by a connecting-rod, R, whose other end is fastenedadjustably to a face-plate on the end of shaft B.

Hung in frame K and reaching from side to side is a rod, 0, havingsecured movably thereon collars p 12, between which the cardboard passesas it enters the feed-rollers, said collars being held in a desiredposition by setscrews, and being capable of adjustment to receive andguide strips of a greater or less width, according to the size of thebox to be made.

To raise the scrap from the punch after a blank has been cut out, I usea picker of the form shown at S in Figs. 1 and 5. Said picker is formed,preferably, with sheet-metal arms extending along each end of the punchand has collars t, which slide on rods or bolts a, secured in the bed ofthe press, said picker being forced upward by spiral springs 12.

The plate E has at each end bolts 10, whose heads engage thescrap-picker just described, as the cutting-die descends, thus forcingsaid picker downward whilein the act of completing a cut; but as soon asthe die recedes the picker follows upward, carrying the scrap before itto a position slightly above the level of the punch.

Having described the feeding, guiding, and cutting mechanism, I willproceed to describe the devices by which I separate the blanks from thestrip of scrap-board. Near the front or delivery end of the machine is achute, T, for the cut blanks to pass off on, said chute being made,preferably, of sheet metal, and secured at its forward end to aremovable table. as shown; or, if preferred, it may be attached to theframe of the press. The free end of said chute extends nearly to thepunch I, and its upper face is at the same level as the upper face ofsaid punch, so that as the scrap and cut blanks are fed outward togetherthe blanks pass onto the free end of the chute, and slide forward into asuitable receptacle, or onto a table, as shown in Fig. 1. The strip ofscrap meanwhile passes underneath the chute T, being drawn taut and keptfrom contact with said chute by friction-rolls V IV, which travelslightly faster than the feed-rolls N O. The gear X, which drivesfriction-roll W, is connected' through idle-gears 3/ a with gear P,

above described,and roll Vis preferably made of solid iron or otherheavy material. After having passed rollers'VWthe scrap is depos itedunder the press-frame, and is removod as often as is necessary by theoperator in charge. It will of course be understood that a cuttingdieand punch must be provided for each different size of box, as well asfor each cover.

Having thus described my invention, I claim- 1. A die for cuttingpaper-box blanks, comprising a core having a rectangular notch at eachcorner, cutters removably secured to the notched core, a series ofoutline-cutters extending from corner cutter to corner cutter andremovably secured to the core, and a series of scoring-knives, 0,located within and extending below the level of the outline cutters,substantially as set forth.

2. The combination, with a die comprising a core having cuttersremovably secured at its corners, a series of outline-cutters, H,removably secured to the core and arranged as described, and a series ofscoring-knives, 0, located within and below the level of saidoutline-cutters, of a punch whose outline corresponds to theoutline-cutters of the die, and a series of springs, by means of whichthe cut blanks are automatically removed from the die, substantially asset forth.

3. In combination with a core, F, having a rectangular notch at eachcorner, a series of corner cutters removably secured to the notchedcore, a series of outline-cutters, H, extending from corner cutter tocorner cutter and removably secured to said core, a series ofscoring-knives, 0, located within and below the level of saidoutline-cutters, a punch to engage the outlinecutters, mechanism,substantially as described, formoving the die into and out of engagementwith the punch, and means, substantially as described, forintermittingly feeding a continuous strip of cardboard between the punchand die, substantially as described.

4. In combination with a punch and die capable of cutting and scoring apaper-box blank at a single operation, mechanism, sub-' stantially asdescribed, for moving said punch and die in and out of engagement,mechanism, substantially as described, for intermittently feeding thecard-board to said punch and die, and devices, substantially asdescribed, for disposing of and separating the cut blanks and scrap,consisting of a suitably-supported chute, T, whose inner free endreaches nearly to the punch to receive and deliver the cut blank, and apair of frictionrolls located under said chute and acting to draw thestrip of scrap downward, as described, and for the object set forth.

ADDISON KINGSBURY.

